| A | B |
|---|
| excretory | the kidneys, lungs, and skin belong to this system |
| ureters | tubes leading from each kidney to the bladder |
| bladder | muscular organ that holds urine |
| urethra | leads from the bladder to outside the body |
| carbon dioxide | lungs excrete water and this substace |
| moisture (water) | creates fog when you breathe on a cold window |
| nephrons | the filtering units in the kidney |
| renal veins | returns purified blood to the body from the kidneys |
| kidneys | filter blood that has collected wastes from cells |
| tubing | blood is pumped through this during dialysis |
